Chapter 1 Introducing the GLC1320G-55

Loop GuardLoop guard protects against network loops on the edge of you network.Double Tag Mode (DT)

For untagged packets, DT adds outer VLAN tag and inner VLAN tags. For tagged packets, DT adds an outer VLAN tag.

System Monitoring•System status (link status, rates, statistics counters)•Temperatures, voltage reports and alarms.Configurable Alarms

The system allows you to customize the priority levels of individual alarms and the alarm severity threshold for recording alarms on an individual slot(s).

Alarm LED

An ALM (alarm) LED lights when the GLC1320G-55 is overheated, the voltage readings are outside the tolerance levels, a fan fails, or another alarm with a severity level of MAJOR or CRITICAL occurs.

IEEE 802.1Q Tagged VLAN

Your GLC1320G-55 uses the IEEE 802.1Q Tagged VLAN (Virtual Local Area Network), which allows it to deliver tagged/untagged frames to and from its ports. The IES supports up to 4094 individual VLANs.

Multicast VLAN

Multicast VLAN is designed for applications (such as Media-on-Demand (MoD)) using multicast traffic across an Ethernet ring-based service provider network. Multicast VLAN allows one single multicast VLAN to be shared among different subscriber VLANs on the network. This improves bandwidth utilization by reducing multicast traffic in the subscriber VLANs and simplifies multicast group management.

IEEE 802.1x Port-based Authentication

The GLC1320G-55 supports the IEEE 802.1x standard for centralized user authentication and accounting management through an optional network authentication (RADIUS) server.

Port Isolation

The GLC1320G-55's port isolation feature allows each port to communicate with the uplink port but not communicate with each other. This option is the most limiting but also the most secure.

 

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GLC1320G-55 User’s Guide